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"It just hovers around. I was wondering if we got a police chopper or something," Seabright resident Steve Carrillo said.

"I've been hearing a helicopter for the last few weeks, every day, circling over my house back and forth. It's pretty annoying," Seabright resident Al Jones said.

As it turns out, PG&E is behind the mysterious blue and white choppers.

The gas and electric company is using helicopters to get aerial views of their pipeline. Their goal is to prevent gas ruptures by looking for any excavation or digging that could lead to a gas leak.

"If we see something we will circle several times trying to get a good picture. We've been patrolling about 145 miles of transmission pipeline (daily)," Pipeline Patrol Superintendent David Wood said.

PG&E said the helicopters will continue flying through the end of August.

Crews are also working on the ground conducting hydro-testing of its natural gas lines to find leaks. They use high-pressure pumps to send water through five and a half miles of pipeline from Capitola to Felton.

"It's a preventative measure that allows us to identify and fix potential issues before they become an issue," PG&E spokesman Nick Stimmer said.